Attachment for ripsaws



4 Sheets-Sheet l Oct. 8, 1940. R. H. CROUCH ATTACHMENT FOR RIPSAYIS Filed Oct. 16. 1956 1940- R. H. CROUCH ATTACHMENT, FOR RIPSAWS 4 Sheets-Sheet Filed Oct. 16, 1936 Oct. 8, 1940. R. H. CROUCH ATTACHMENT FOR HIPSAWS Filed Oct. 16, 1936 4 Sheets-Sheet 3 Oct. 8, 1940. CROUCH ATTACHMENT FOR RIPSAWS Filed Oct. 16, 1936 4 Sheets-Sheet 4 Patented Oct. 8, 1940 UNITED STATES PATENT OFFICE ATTACHMENT FOR RIP'SAWS Application October 16, 1936, Serial No. 106,041

1 Claim.

My invention relates to an improvement in attachments for ripsaws.

The object is to provide a mechanism for attachment to ripsaws, especially designed for producing round corners for furniture. A further object is to provide mechanism for simplifying the work of making these round corners with a maximum of speed and maximum of economy. This invention consists in an attachment which is so constructed that it may be easily applied to and removed from standard and other makes of ripsaws.

In the accompanying drawings:

Fig. l is a view in perspective of a type of ripsaw showing my improved attachment applied;

Fig. 2 is a top plan view;

Fig. 3 is a horizontal section;

Fig. 4 is a longitudinal vertical section;

Fig. 5 is a vertical cross-section;

Fig. 6 is a detail;

Fig. 7 is an elevation, partly in transverse vertical section;

Fig. 8 is a similar view taken at a point to. show the saws;.

Fig. 9 is a view showing an end of the stock after the channel has been sawed through;

Fig. 10 is a similar view showing the stock after the sides have been formed by the cutterheads; and

Fig. 11 shows the round corner.

The letter A, represents the table of a power ripsaw, and the numeral 1 indicates a chain and belt conveyor, and 2 is a guide against which the stock is held while being fed through the machine from the feed end, which feed end is at the right as illustrated in Fig. l of the drawings.

The endless conveyor I is driven by a. motor 3, shown at the left in Fig. 1. The foregoing features are well-known and common to this type of ripsaw.

My invention consists of the following elements. A casing l is vertically adjustable up and down between dove-tailed guides 5, and these guides extend from the table to the overhanging arms 6.

The vertical adjustment is provided through the shaft 1 extending longitudinally of the easing. This shaft '1 has a hand-wheel 8 on one end by which it is turned, and has worms 9 thereon which engage and turn worm-gears in the worm-gear boxes l0 (see Figs. 1 and 2). These worm-gears are keyed on the screws II, and as the shaft '1 is turned, rotary motion is transmitted simultaneously to the two screws ll,

and by that means the entire attachment is raised or lowered on the guides 5.

The saws and cutter-heads are rotatably and adjustably mounted within this casing 4, as will be explained.

A gang of saws I2 is secured on the shaft l3, and this shaft is driven by a motor I4, and in order to shift the saws transversely within the casing, means is provided for adjusting the motor shaft and saws back and forth. This ,consists of a guide and supporting arm 15 projecting transversely from the casing, by which the motor is supported, and has adjustable connection through the adjusting screw i6, working through the threaded stud I1 and swiveled in the stud 8, as viewed in Figs. 2, 3 and 8.

The saws l2 may be removed, replaced, or their number reduced or increased by removing the nut 19 on the end of the shaft 13.

Pressure rollers 20, 2|, 2| 22, 22', 23 and 24 are rotatably supported in bearings in opposite sides of the casing, their function being to hold the material down upon the traveling conveyor chain i.

These rollers may be adjusted up and. down to regulate their pressure by set-screws 25 provided for that purpose, and these set-screws bear on springs 26 which press yieldingly upon the bearings of the rollers, as shown in detail in Figs. 5 and 6.

There are two cutter-heads shown. These are indicated by the numerals 21 and 28'. These are journaled in bearings 29' of any approved form, as, for instance, such as are shown in section in Fig. 4.v These are adjustable vertically through the adjusting screws 28, as viewed in Figs. 2, 3 and 4, and adjustable laterally by the screws 29, as shown in Figs. 1, 2, 3 and 7 The cutter-heads maybe driven in any approved manner from a motor 30 by means of the two belts 3| and 32 passing around drums on the shafts of the two cutter-heads, or they could be driven by two separate motors located oif at the side (not shown) For convenience, the motor 30 may have an arm 33 by which it is pivoted to a post 34, whereby it may be swung to one side, to regulate the tension of the belts.

It may be found convenient to position independent motors for the cutter-heads 21 and 28' in a vertical position rather than to provide the shafts and bearings 29 therefor, as shown in Figs. 4 and 7.

In Fig. 9, a strip of plywood stock is shown just as the saws have cut or plowed through to form the groove, and Fig. 10 shows the same stock after it has passed the two cutter-heads. Of course, it is understood the cutter-heads are adjusted laterally so that one cuts one groove of the channel, and the other one follows and cuts a groove in the other side of the channel.

In Fig. 11 is illustrated the round corner which has been formed by placing a core block in the channel and bending the sides of the stock around at right-angles to each other, all of which has been fully explained in two accompanying applications for patents on round corners.

Thus it will be seen the attachment is simple and includes relatively few parts, all of which are housed and supported in the casing 4, which is attachable to, and detachable from, the main ripsaw, thus making it possible to utilize the more or less standardized ripsaw for fashioning stock of different thicknesses in the formation of round corners for furniture, and especially where the stock is comparatively thin, such as quarter-inch stock.

It will be understood that this attachment is adapted not only for cutting round corners, but also for dado, router or shaper work, and in fact for any continuous feed employing chains, belts, or any sort of feed, or even where the stock is pushed through the ripsaw by manual labor or in any other way.

I claim:

An attachment for standard and other makes of ripsaws including a hollow casing comprising top, sides and ends, a motor located at one side of the casing and supported thereby, a shaft driven by the motor and extending into the easing, saws carried by said shaft, means for shifting the motor, shaft and saws with respect to the casing whereby to regulate the position of the saws, a shaft extending through the top of the casing and journaled within the casing, and having a cutter thereon, separate means located within the hollow casing for shifting the shaft vertically and horizontally, and a motor connected with the casing for driving said shaft.

RICHARD H. CROUCH. 

